Microcalorimetric study of the acidity and basicity of metal oxide surfaces
| Autor: | Antonella Gervasini, Aline Auroux |
|---|---|
| Rok vydání: | 1990 |
| Předmět: |
Isothermal microcalorimetry
chemistry.chemical_classification Chemistry Inorganic chemistry General Engineering Oxide Order (ring theory) Ionic bonding Metal chemistry.chemical_compound Adsorption visual_art visual_art.visual_art_medium Molecule Physical chemistry Compounds of carbon Physical and Theoretical Chemistry |
| Zdroj: | The Journal of Physical Chemistry. 94:6371-6379 |
| ISSN: | 1541-5740 0022-3654 |
| Popis: | The adsorption of probe molecules such as NH{sub 3} and CO{sub 2} was studied on about 20 simple metallic oxides by use of microcalorimetry in order to determine the number and character of basic and acidic surface sites. Microcalorimetry allowed a simultaneous determination of the strength and energy distribution of the adsorption sites. The adsorption isotherms, the differential heats, the integral heats, and the energetic histograms are given for NH{sub 3} and CO{sub 2} adsorptions. Relationships between the average adsorption heats of NH{sub 3} and CO{sub 2} have been found as a function of the ionic character percentage and of the charge/radius ratio. |
| Databáze: | OpenAIRE |
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